Electrically-driven suspensible hoist.



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P. A. WMDRON.` BLEGTRICALLY DRIVEN SUSPBNSIBLB Hols-T.

APPLICATION FILED JUNI; 24. 1903.

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No. 741,390. PATBNTED 00T. 1`3,'19o s- E. A. WALDRON.

ELEGTRIGALLY DRIVBN SUSPBNSIBLBHOIST. A'PPLIOATION FILED JUNE 24, 1903. N0 MODEL. 2 SHEETS-SHEET? .[NVENTOR Allorney i l lI y SN. o

WITNESSES UNITED Srafrns Patented October 13, 1903.

FREDERICK A. WALDRON, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE dt TOWNE MANUFACTURING COMPANY, OF STAMFORD,

CONNECTICUT.

ELEGTRICALLYDRH/ENI` SUSPENSIBLE HOIST.

SPECIFCATION forming part of Letters Patent N o. 741,390, dated October 13, 1903.

Application filed June 24,1905. Serial No. 162.958. (No model.)

To all whom Azit may con/cern:

Beit known that I, FREDERICK A. WAL- DRON, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Electrically-Driven Snspensible Hoists; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvementin electrically-driven suspensible hoists; and it consists in a hoist with a single point of susv pension and comprising a motor, a wormwhole.

at their upper ends, the cross-head 2, carry- Wheel, a drum, a worm-shaft, and the armature-shaft of a motor, the worm-shaft located at an angle to the armature -shaft and on the side of the suspension-point opposite the motor.

In the accompanying drawings, Figure 1 is a view in side elevation, partly in section, of

ing the suspension-plates, being mounted in these curved ends near the free ends of the latter, and they are secured together in parallel relation by the cross-head, by spacingbolts 4, and by the casing 5. This casing is made in two sections bolted together and is of general cylindrical shape to comfortably cover and inclose the worm-wheel 6. This casing is provided near its center with en larged hubs 7, which latter are mounted in openings formed in the suspension-plates 1,

as clearly shown in Fig. 2. The lower end of the casing 5 is enlarged to span the space between the two plates l and is locked to the latter by a bolt or pin 8, as clearly shown in Fig. 2.

Mounted in the hubs 7 of the casing 5 is the shaft 9, and secured to the shaft within the sectional casing 5 is the worin-wheel 6,

and to the ends ofthe shaft outside the plates 1 are the winding-drums 10. The hoist cable or chain 11 is secu red at its ends to the drums. Hence when the latter are rotated by the rotation of the worm-wheel 6 the cable or chain 11 will be wound upon or unwound from the drums, as the case may be. This cable or chain carries the hoist-pulley 12.

Secured to the casing is the electric: motor 13. This motor is located at one side of the suspension-point and receives its current through wires in the well-known manner and is provided with the ordinary switch and rheostat by which the movements of the Inotor are controlled and, if desired, may be provided with a brake for holding the load suspended and for regulating the descent of the load. With a screw in which the pitch or angle of the threads render it self-holding a brake would not be necessary; but with a screw that is not self-holding a brake would be desirable. The armature-shaft 14 of the motor passes between the suspension-plates 1 to a point beyond the center line of the tackle and is mounted near its free end in a bearing 15, secured to or integral with the casing 5. Secured to the free end of this shaft 14 is the bevel-pinion 16, which meshes with the bevel-pinion 17, secured to the wormshaft 18. The rim of this pinion 17 rests below and inclines downwardly from the armature-shaft at an angle to the latter, and the body or spokes 19 of the pinion project downwardly in the form of a cone, so .as to bring the hub 2O of pinion 17 close up to the side of the casing 5 on the side or edge farthest removed from the motor 13. The pinion 17 and its hub are inclosed by the conical casing 21, secured to the casing 5.

'The casing 5 is provided on its side or edge opposite the motor with the housing 22, in which the'worm-shaft 18 is mounted. This shaft normally rests in an inclined position wholly to one side of the center line of tackle and at an angle to armature-shaft 14 and restsat its lower end on the step 28, held in place by the lower removable cap 24. The interior of this housing is somewhat greater in area than the diameter of the Worm-shaft, thus forming an oil-chamber in which the thrust-bearing may be submerged.

While I have shown two winding-drums, it is evident that one only may be used, and while a drum or drums are preferably employed where a wire rope is used a pocketed sheave or sheaves for use with a chain may be substituted forthe drums. Hence I would have it understood that the word drum is intended to cover and include either a drum for a rope or a sheave for a chain.

It is evident that changes in the construction and relative arrangement of the several parts might bel made without avoiding my invention, and hence I would have it underv stood that I do not restrict myself to the particular construction and arrangement of parts shown and described; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a hoist with a single point of suspension, the combination with a hoisting-drum and a worm-wheel, of an electric motor on one side of the suspension-point, a Worm-shaft on the other side and gearing con necting the m0- tor and worm-shaft.

2. In a hoist with a single point of suspension, the combination with a hoisting-drum and a worm-wheel, of an electric motor on one side ofthe suspension-point and provided with a motor-shaft, a worm-shaft on the opposite side of the suspension-point and engaging the worm-wheel, and a gear on said worm-shaft engaging the pinion on the motor-shaft, the

Worm-shaft being at an angle to the motorshaft.

3. In a hoist with a single point of suspension, the combination with suspension-plates having laterally-projecting upper ends and a hook connected to said projecting ends, of a casing secured to and between the plates, a shaft mounted in said casing, a worin-wheel and hoist-drum secured to said shaft, and a motor and gearing carried by the casing.

4. In a hoist having a single point of suspension, the combination with parallel suspension-plates having laterally-projecting upper ends, and a hook connected to said projecting ends, of a casing secured to and between said plat-es and having hubs projecting through the plates, a shaft mounted in said hubs, a worm-wheel secured to the shaft within the casing, a hoist-drum secured to the shaft outside the casing, a motor carried by said casing to one side of the suspensionpoint, and a worm-shaft also carried by said casing on the opposite side of the suspensionpoint, the motor-shaft and said Worm-shaft being placed at an angle with each other and connected by gearing.

5. The combination with parallel suspension-plates, a casing secured to and between said plates and provided with hubs, a shaft mounted in said hubs, and a worm-wheel and a hoist drum or sheave secured to the shaft, of a worm-shaft located within ahousing carried by the casing, a motor also carried by the casing and gearing connecting the motor and worm-shaft.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

FREDERICK A. WALDRON.

Witnesses:

SOHUYLER MERRITT, F. I. TowNE. 

